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Resistance of Picea abies seedlings to infection by Heterobasidion annosum in relation to drought stress
Author(s) -
Lindberg M.,
Johansson M.
Publication year - 1992
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1992.tb01438.x
Subject(s) - heterobasidion annosum , biology , picea abies , botany , resistance (ecology) , bark (sound) , seedling , horticulture , drought stress , strain (injury) , water stress , agronomy , ecology , anatomy
Norway spruce (Picea abies) seedlings, 2–4 years old, were subjected to different degrees of stress. Drought stress affected the predisposition to infection by Heterobasidion annosum in the same way in root wood, stem wood and stem bark. At high water potentials (−3 to −5 bar) resistance was high, at intermediate levels (‐ 5 to ‐ 15 bar) it was low but increased again at water potentials below ‐ 8 to ‐ 15 bar. Neither light nor oxygen deficiencies appeared to have adverse effects on resistance. Total length of unsuberized roots was a sensitive indication of strain on the seedlings.